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  3. The point of factory farming is cheap meat, made possible by confining large numbers of animals in small spaces. Perhaps the gre

The point of factory farming is cheap meat, made possible by confining large numbers of animals in small spaces. Perhaps the gre

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问题     The point of factory farming is cheap meat, made possible by confining large numbers of animals in small spaces. Perhaps the greatest hidden cost is its potential effect on human health.
    Small doses of antibiotics (抗生素)-too small to kill bacteria—are【C1】______to factory farm animals as part of their【C2】______diet to promote growth and cancel the risks of overcrowding. What factory farms are really raising is antibiotic-resistant bacteria, which means that several classes of antibiotics no longer work the way they should in humans. We pay for cheap meat by【C3】______some of the most important drugs ever developed.
    Last week, the Natural Resources Defense Council, joined by other advocacy groups, sued the Food and Drug Administration to【C4】______it to end the use of penicillin (盘尼西林)and tetracycline (四环素）not for curing diseases in farm animals. Vets would still be able to treat sick animals with these drugs but could not【C5】______add the drugs to their diets.
    For years, the F. D. A. has had the scientific studies and the【C6】______to ban these drugs. But it has always bowed to【C7】______from the farm lobbies, despite the well-founded【C8】______of groups like the American Medical Association and the World Health Organization, which support an antibiotic ban.
    It is time for the F. D. A. to stop corporate factory farms from wasting【C9】______drugs just to promote growth among animals confined in conditions that inherently create the risk of disease. The F. D. A. can change that by honoring its own scientific conclusions and its legislative obligation to end its【C10】______of unsafe drug uses.
A)approval I)objections
B)authority J)pressure
C)compel K)regular
D)compulsively L)routinely
E)demand M)sacrificing
F)fed N)support
G)initiating O)valuable
H)investigation
【C3】
选项
答案M
解析 空格前出现by，故空格处应填入动名词，表示通过做某事达到某个目的或效果。由上文可知，抗生素被添加进动物饲料中，使得一些抗生素不能再在人体上发挥其治病作用，因此，一些非常有用的抗生素被白白浪费掉，故选择sacrificing"牺牲，浪费”。
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